I bit the bullet and started building a thickness sander. I just sanded the drum round. Every thing looks good so far. The next step will be to mount the sand paper.

What is the best way to mount the sand paper?
1- Glue it to the drum? How do you change it if you do that?
2- Fasten it only on the ends using a wedge. Will this run smooth?
3- Velcro this has advantages but will the softness round the edges?